/*
 * Copyright 2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.github.hylexus.xtream.codec.server.reactive.spec.impl;

import io.github.hylexus.xtream.codec.common.utils.XtreamBytes;
import io.github.hylexus.xtream.codec.server.reactive.spec.XtreamRequest;
import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import org.jspecify.annotations.NonNull;
import org.jspecify.annotations.Nullable;

import java.net.InetSocketAddress;

public abstract class AbstractXtreamRequestBuilder<B extends XtreamRequest.XtreamRequestBuilder, R extends XtreamRequest>
        implements XtreamRequest.XtreamRequestBuilder {

    protected final R delegateRequest;
    protected int version;
    protected @Nullable ByteBuf payload;
    protected @Nullable InetSocketAddress remoteAddress;
    protected @Nullable Channel channel;

    public AbstractXtreamRequestBuilder(R delegateRequest) {
        this.delegateRequest = delegateRequest;
        this.payload = delegateRequest.payload();
        this.channel = delegateRequest.underlyingChannel();
        this.remoteAddress = delegateRequest.remoteAddress();
        this.version = delegateRequest.version();
    }

    @SuppressWarnings("unchecked")
    B self() {
        return (B) this;
    }

    @Override
    public @NonNull B payload(ByteBuf payload, boolean autoRelease) {
        final ByteBuf old = this.payload;
        try {
            this.payload = payload;
            return self();
        } finally {
            if (autoRelease) {
                XtreamBytes.releaseBuf(old);
            }
        }
    }

    @Override
    public @NonNull B remoteAddress(InetSocketAddress remoteAddress) {
        this.remoteAddress = remoteAddress;
        return self();
    }

    @Override
    public XtreamRequest.XtreamRequestBuilder version(int version) {
        this.version = version;
        return self();
    }

    @Override
    public abstract @NonNull R build();

}
